> >>> Some postings a while back led me to believe that I could specify
> >>> multiple hosts for the -d option of spamc. I understood that it
> >>> would operate basically on a fallback basis (not load balancing).
> >>> However, I can't seem to get spamc to use more than one of the -d
> >>> listings. I've tried:
> >>>
> >>>/usr/bin/spamc -d 123.45.67.8 -d 127.0.0.1
> >>>/usr/bin/spamc -d 123.45.67.8 127.0.0.1
> >>>
> >>> And switched the order around and fiddled with hostnames vs IP
> >>> addresses, but no dice. I understand the man page to say that it
> >>> will use fallback logic if the hostname resolves (via DNS query,
> >>> right?) to more than one host... so why can't I give it those hosts
> >>> directly?
> >>
> >> From http://spamassassin.apache.org/full/3.0.x/dist/doc/spamc.html
> >>
> >>"-d host
> >> In TCP/IP mode, connect to spamd server on given host (default:
> >>localhost).
> >>
> >> If host resolves to multiple addresses, then spamc will fail-over
> >>to the other addresses, if the first one cannot be connected to"
> >>
> >>You need to have a host that has multiple A records.
> >>
> >>spamd.domain.com A 123.123.123.123
> >>spamd.domain.com A 123.123.123.124
> >>spamd.domain.com A 123.123.123.125
> >>
> >>/usr/bin/spamc -d spamd.domain.com
> >>
> >>If your DNS server sends the results back in a different order each time
> >>then it will not be a fallback but a round robin. You might be able to
> >>simply use /etc/host entries. I've never tried it as I use qmail which
> >>will not use the host file, so I always rely on DNS. Don't know if spamc
> >>will use the host file or not.
> >
> > Huh, I am not familiar with how to use /etc/hosts as a DNS source. Can
> you
> > clarify?
>
> I didn't mean use it as a dns source, but many programs can look first
> to your /etc/hosts file prior to doing a DNS lookup. I do not know if
> spamc will do that, I do not believe it does.
>
> > Mainly my question was if/how I could avoid making it a DNS query. I'd
> like
> > to simply hand spamc the two addresses that I want it to have manually,
> and I
> > do *NOT* want round-robin, I want failover....
>
> I do not think you can do this. You can use a IP address with spamc to
> save a lookup. I use the following run script under demontools,
>
> #!/sbin/sh
>
> PATH=/usr/bin:/usr/local/bin
>
> exec /usr/local/bin/softlimit -a 128000000 \
> /usr/local/bin/spamd -i 10.0.240.253 -p 1783 -A 10.0.240.0/24 \
> -m 10 --max-conn-per-child=200 -u vpopmail -x -q -s stderr 2>&1
>
> I do not believe you can have mulitple addresses behind the -i switch,
> at least the docs do not lead me to believe it is possible. Maybe
> someone else knows better.
spamd is not a problem for me. I run spamd on two machines, one being my
main SA server, and one being a fallback just in case something goes awry
(something recently did). I'd really like to be able to tell spamc that it
can go to a 2nd IP address in case the first one fails, possibly by doing as
I wrote above:
/usr/bin/spamc -d 123.45.67.8 -d 127.0.0.1
but it seems I can't do this unless I go the DNS route (which I don't know
how to do, since my main SA server must be routed to using an internal
network IP).
Thanks!
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